From: owner-emc-p...@listserv.ieee.org
[mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of Brent DeWitt
Sent: Thursday, July 08, 2004 7:11 PM
To: T.Sato; emc-p...@ieee.org
Subject: RE: FCC Part 18 - measurement at closer distance
http://www.ieee-pses.org/symposium
http
http://www.ieee-pses.org/symposium
http://www.emc2004.org/
I read in !emc-pstc that Brent DeWitt wrote (in
) about 'FCC Part 18
- measurement at closer distance' on Thu, 8 Jul 2004:
>At close
>distances the FCC allows 1/d^2, but the reality is closer to 1/d^3 at 3, 10
>and 30 meters.
http://www.ieee-pses.org/symposium
http://www.emc2004.org/
Brent,
On Thu, 8 Jul 2004 19:10:49 -0600,
"Brent DeWitt" wrote:
> I have had experience submitting data taken at a closer distance than
> specified, although in this case it was 120kHz RF-ID systems. At close
> distances t
lto:owner-emc-p...@listserv.ieee.org]On Behalf Of T.Sato
> Sent: Thursday, July 08, 2004 6:44 PM
> To: emc-p...@ieee.org
> Subject: RE: FCC Part 18 - measurement at closer distance
>
>
> http://www.ieee-pses.org/symposium
>
http://www.ieee-pses.org/symposium
http://www.emc2004.org/
On Thu, 8 Jul 2004 08:14:44 -0600,
drcuthb...@micron.com wrote:
> I ran the sim again using perfect GND. The field falls off as 1/d. Over
> lossy ground it falls off much faster than 1/d. The antennas are 1/4
> wavelength gro
http://www.ieee-pses.org/symposium
http://www.emc2004.org/
Thank you.
> From: drcuthb...@micron.com
> Date: Thu, 8 Jul 2004 08:14:44 -0600
> To: , ,
> Subject: RE: FCC Part 18 - measurement at closer distance
>
> Ken,
>
> I ran the sim again using perfect GND
l down the aggregate productivity of the entire
world (speaking as an economist would).
Dave Cuthbert
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Thursday, July 08, 2004 8:05 AM
To: drcuthbert; vef00...@nifty.ne.jp; emc-p...@ieee.org
Subject: Re: FCC Part 18 - measurement at close
ld be interesting to know what assumptions were made to derive the field
intensity profile. I hasten to add I know nothing about NEC or how you use
it.
> From: drcuthb...@micron.com
> Date: Thu, 8 Jul 2004 07:52:27 -0600
> To: ,
> Subject: RE: FCC Part 18 - measurement at closer
http://www.ieee-pses.org/symposium
http://www.emc2004.org/
Tom,
I am assuming your device operates at 13.56 MHz. I ran a NEC-2
simulation over "average" GND and the reduction in field strength is:
DX 1/d NEC
30 m0 dB0 dB
30020 30
1600 35 58
So, acco
http://www.ieee-pses.org/symposium
http://www.emc2004.org/
I don't have the 46 CFR section you listed, but looked at 47 CFR Part 18
>from 1984, so what follows may not be exactly what you were after, but it
seems quite clear to me that the two "options" you cited are not mutually
exclus
10 matches
Mail list logo
